work on the structure view.

...rg/jastadd/tooling/aspect/AspectStructureViewElement.java

...rg/jastadd/tooling/aspect/AspectStructureViewFactory.java

.../org/jastadd/tooling/aspect/AspectStructureViewModel.java

.../jastadd/tooling/aspect/JastAddAspectAttributeFilter.java

.../org/jastadd/tooling/aspect/psi/AspectElementFactory.java

...rg/jastadd/tooling/aspect/psi/JastAddAspectAttribute.java

...psi/impl/JastAddAspectAspectDeclarationImplExtension.java

...spect/psi/impl/JastAddAspectAstTypeNameImplExtension.java

.../impl/JastAddAspectClassOrInterfaceTypeImplExtension.java

...oling/aspect/psi/impl/JastAddAspectCollAttributeImpl.java

...ooling/aspect/psi/impl/JastAddAspectInhAttributeImpl.java

...ooling/aspect/psi/impl/JastAddAspectSynAttributeImpl.java

...ooling/grammar/psi/impl/GrammarTypeDeclImplExtension.java

src/main/resources/META-INF/plugin.xml